Details

This high zoom ratio lens is designed exclusively for digital SLR cameras and incorporates Sigmas original OS (Optical Stabiliser) technology. This system offers the use of shutter speeds approximately 4 stops slower. SLD (Special Low Dispersion) and aspherical lenses provide excellent correction for all types of aberrations. High image quality is assured throughout the entire zoom range. Sigmas newly developed Thermally Stable Composite (TSC) allows for a more compact design and the HSM (Hyper Sonic Motor) ensures fast and quiet auto-focusing. This lens has a minimum focusing distance of 35cm and a maximum magnification ratio of 1:2.9, making it convenient for close-up photography.

Features

18-250mm lens

f/3.5-6.3

HSM (Hyper Sonic Motor) for quiet auto-focusing

Super Multi-Layer Coating

Sigmas unique OS technology

This lens is equipped with Sigmas own unique OS technology. This system offers the use of shutter speeds approximately 4 stops slower. It also compensates for camera shake when shooting moving subjects such as motor sports.*Sony and Pentax mounts do not incorporate Optical Stabilisation.

Superior image quality

One SLD (Special Low Dispersion) glass element offers excellent correction of colour aberration and three aspherical lenses, including a double-sided aspherical lens, prevent and correct all types of aberrations such as astigmatism, achieving high image quality throughout the entire zoom range.

A minimum focusing distance of 35cm throughout the entire zoom range and a maximum magnification ratio of 1:2.9 makes this lens ideal for close-up photography. When the APS-C size sensor is taken into consideration, the effective maximum reproduction ratio becomes 1:2.

Quiet and fast AF

An inner focusing system and the incorporation of HSM provide fast and quiet auto-focusing.*AF will not function if the Pentax camera bodies do not support HSM.

Petal-type hood

This lens is supplied with a Petal-type hood to block out extraneous light and reduce internal reflections.

Magnification scale

A magnification scale is displayed on the lens barrel, ensuring ease of use.

*Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.